Crits only?

I was wondering if there was a way to get Parrot to only show me damage that were crit's only?

I am a casual player, I do not care what I hit a mob for - I hit a mob and do x amt of damage, fine whatever I don't care but I do like seeing the crit's I do. Is there a way to get Parrot to only show me the crit damage I do and not show me the regular non-crit stuff?